CN117498412A - Grid-off and grid-on switching control method of energy storage inverter - Google Patents
Grid-off and grid-on switching control method of energy storage inverter Download PDFInfo
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- CN117498412A CN117498412A CN202311497319.5A CN202311497319A CN117498412A CN 117498412 A CN117498412 A CN 117498412A CN 202311497319 A CN202311497319 A CN 202311497319A CN 117498412 A CN117498412 A CN 117498412A
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- switching control
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- 238000004146 energy storage Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 34
- 238000012544 monitoring process Methods 0.000 claims abstract description 19
- 238000002955 isolation Methods 0.000 claims description 15
- 238000007664 blowing Methods 0.000 claims description 13
- 238000001125 extrusion Methods 0.000 claims description 12
- 239000000428 dust Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 230000013011 mating Effects 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 238000005192 partition Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 2
- 239000007924 injection Substances 0.000 claims 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000009434 installation Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/24—Circuit arrangements for boards or switchyards
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/46—Boxes; Parts thereof or accessories therefor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a grid-connected and off-grid switching control method of an energy storage inverter, and belongs to the field of power supply equipment. The off-grid and on-grid switching control device of the energy storage inverter comprises a box body, wherein a change-over switch is arranged in the box body, and a controller is arranged on one side of the change-over switch in the box body; according to the invention, under the mutual cooperation of the switching component cooling component and the swinging component, when the device monitors the conveyed power grid line, the switching component is used for switching the sensors of the two monitoring power grid lines in real time, comparing measured data, improving the accuracy of the device during monitoring the power grid line, conveying external cold air into the device during switching, cooling the sensor, avoiding the influence of a high-temperature environment on the sensor, improving the stability of the device during monitoring the power grid line, avoiding damage of overload or short circuit of the line to the energy storage device, and saving maintenance cost.
Description
Technical Field
The invention relates to the technical field of power supply equipment, in particular to a grid-connected and disconnected switching control method of an energy storage inverter.
Background
An energy storage inverter, also known as an energy storage converter (PCS), is a key device that connects an energy storage device to the power grid. Its main functions include controlling the charge and discharge processes of accumulator and AC/DC conversion. In addition, the energy storage system is also provided with the capability of connecting the energy storage system to an independent power grid system and a power transmission and distribution power grid. In the absence of a grid, the energy storage inverter may even supply the ac load directly. The off-grid and on-grid switching control device of the energy storage inverter is a core part of an off-grid energy storage system and consists of a photovoltaic string, LUNA2000 energy storage, an inverter, an alternating current switch, a load, an off-grid controller, a power distribution unit, an ammeter, a power grid and the like. And switching the off-grid state of the inverter through the off-grid controller.
When the storage battery is charged by the power grid, overload or short circuit is caused due to some reasons, so that the energy storage equipment is damaged, a sensor is generally installed in the energy storage inverter control device to monitor the passing current and voltage, and therefore the device is conveniently controlled by grid-connected switching.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, the installed sensor is poor in overall stability and is easy to be influenced by environment to reduce the accuracy of data when monitoring a network electric line, and the device is not timely in off-grid switching and influences energy storage equipment and illumination.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a grid-connected and off-grid switching control method of an energy storage inverter mainly comprises the following steps:
step A, monitoring the voltage and the frequency of a power grid in real time by using the device and the wiring end part through two sensors;
and (B) step (B): and determining whether to switch from grid connection to grid disconnection according to the monitored power grid voltage and frequency and a set threshold value, and controlling a change-over switch to switch from grid connection through a controller installed in the device when the switching is required.
The utility model provides an energy storage dc-to-ac converter from grid-connected switching control device, includes the box, the internally mounted of box has change over switch, the inside of box is located one side of change over switch and is provided with the controller, the one end electric connection of change over switch has the wire, the one end of wire runs through the box and extends to outside, the surface cover of wire is equipped with the sensor of symmetric distribution, the internally mounted of box has the division board, still includes: one end of the switching component penetrates through the box body and extends to the outside, and is used for switching the two monitored sensors; the cooling component is arranged in the box body and is used for blowing, cooling and cooling the inside of the sensor; and the swing assemblies are symmetrically arranged in the isolation plate and are used for improving the blowing range of the cooling assembly.
Preferably, the switching assembly comprises a driving part arranged on the outer wall of one side of the box body, a screw rod is fixed at the output end of the driving part, one end of the screw rod penetrates through the isolation plate and is rotationally connected with the inner wall of the box body through a bearing, a thread block is connected with the surface of the screw rod in a threaded manner, a contact head is arranged on one side surface of the thread block, and a limiting part is arranged at the bottom of the thread block.
Preferably, the limiting piece comprises a limiting block fixed at the bottom of the threaded block, the limiting block is slidably connected to the surface of the limiting rod, and the end part of the limiting rod is fixedly connected with the inner wall of the box body.
Preferably, the cooling assembly comprises a movable rod fixed at the top of the threaded block, an extruding plate is fixed at the end part of the movable rod, the extruding plate is slidably connected in a mounting frame, the mounting frame is fixed on the inner wall of the bottom of the box body, a strip-shaped air bag is mounted in the mounting frame, one end of the strip-shaped air bag is fixed with a gas hose, a gas jet head penetrates through the mounting frame and is provided with a one-way valve, and one end of the strip-shaped air bag is provided with a suction piece.
Preferably, the air suction piece comprises a communicating pipe fixed at the end part of the strip-shaped air bag, the end part of the communicating pipe penetrates through the isolation plate and extends to the outside of the box body to be fixed with an air inlet pipe, and a movable valve is arranged at the joint between the air inlet pipe and the communicating pipe.
Preferably, the swing assembly comprises a conical gear fixed on the surface of the screw rod, a fitting gear is meshed with the surface of the conical gear, a rotating shaft is fixed at the axle center of the fitting gear, the end part of the rotating shaft is rotationally connected with the fixing plate through a bearing, one end of the fixing plate is fixedly connected with the isolation plate, a cam is fixed on the surface of the rotating shaft, and a reciprocating piece is arranged on the surface of the cam.
Preferably, the reciprocating piece comprises a T-shaped rod attached to the surface of the cam, a fixing block is fixed at one end of the T-shaped rod, the fixing block is fixedly connected with the jet head, a limiting plate fixedly connected with the isolation plate is connected to the surface of the T-shaped rod in a sliding mode, an extrusion spring is fixed between the limiting plate and the limiting plate, and the extrusion spring is sleeved on the T-shaped rod.
Preferably, a wiring terminal is fixed on one side surface of the box body, and the change-over switch is electrically connected with the controller.
Preferably, a side face of the box body is rotatably connected with a box door through a hinge, an exhaust port is arranged on the surface of the box door, and a dust screen is arranged on the exhaust port.
Compared with the prior art, the invention provides a grid-connected and off-grid switching control device of an energy storage inverter, which has the following beneficial effects:
1. this energy storage dc-to-ac converter from switching control device that is incorporated into the power networks through setting up at the switching component, mutually supporting with two sensors that set up in the box, carries out real-time monitoring to the net electric line of carrying, carries out automatic switch-over to two monitoring positions when monitoring, then carries out contrast analysis to the data of monitoring, can effectively improve the accuracy of device monitoring data like this, avoids the sensor to take place because of the inaccurate condition of data that the fault caused.
2. The off-grid and on-grid switching control device of the energy storage inverter can drive the cooling assembly to synchronously operate when the on-grid switching assembly operates through the on-grid switching assembly, cold air outside the box body is sucked into the box body and the positions of two sensors installed in the box body are blown to cool down, so that the sensors can be prevented from being failed in a high-temperature environment during long-time working, the service life of the sensors is prolonged, and the stability of the device during monitoring of a network electric line is further improved.
3. This energy storage dc-to-ac converter from grid-connected switching control device, when switching the subassembly operation, can drive cooling subassembly synchronous operation simultaneously for the horizontal reciprocating motion is done to the jet head position of cooling subassembly department, can increase the blowing of cooling subassembly to the sensor like this and spout the scope, reduces the sensor because of the probability that high temperature breaks down, avoids receiving high temperature monitoring environment influence.
The invention is realized by the mutual matching of the switching component cooling component and the swinging component, when the device monitors the transmitted power grid line, the switching component switches the sensors of the two monitoring power grid lines in real time and compares the measured data, the accuracy of device net wire circuit monitoring is improved, when switching, outside cold air can be conveyed to the inside, the sensor is cooled, the influence of a high-temperature environment on the sensor is avoided, the stability of the device net wire circuit monitoring is improved, the damage of wire overload or short circuit to the energy storage device is avoided, and the maintenance cost is saved.
Drawings
Fig. 1 is a schematic diagram of the overall structure of an off-grid and on-grid switching control device of an energy storage inverter according to the present invention;
fig. 2 is a schematic diagram of an open state front view structure of an off-grid switching control device of an energy storage inverter according to the present invention;
fig. 3 is a schematic top view of a grid-connected/disconnected switching control device of an energy storage inverter according to the present invention;
FIG. 4 is a schematic diagram of a cross-sectional structure of A-A in FIG. 2 of an off-grid switching control device of an energy storage inverter according to the present invention;
FIG. 5 is a schematic diagram illustrating a cross-sectional structure of B-B in FIG. 3 of an off-grid switching control device of an energy storage inverter according to the present invention;
fig. 6 is an enlarged schematic diagram of a structure of a region B in fig. 5 of an off-grid and on-grid switching control device of an energy storage inverter according to the present invention;
fig. 7 is a schematic diagram of a cross-sectional structure of the off-grid and on-grid switching control device of the energy storage inverter shown in fig. 2;
fig. 8 is an enlarged schematic diagram of a region a in fig. 7 of an off-grid and on-grid switching control device of an energy storage inverter according to the present invention;
fig. 9 is a schematic diagram of a partial cross-sectional structure of a getter in a grid-connected/disconnected switching control device of an energy storage inverter according to the present invention.
In the figure: 1. a case; 2. a change-over switch; 3. a controller; 4. a wire; 5. a sensor; 6. a switching assembly; 61. a driving section; 62. a screw rod; 63. a screw block; 64. a limiting block; 65. a limit rod; 66. a contact; 7. a cooling component; 71. a moving rod; 72. an extrusion plate; 73. a mounting frame; 74. a strip-shaped air bag; 75. a gas hose; 76. a jet head; 77. a communicating pipe; 78. an air inlet pipe; 79. a movable valve; 791. a one-way valve; 8. a swing assembly; 81. a bevel gear; 82. a mating gear; 83. a rotating shaft; 84. a fixing plate; 85. a cam; 86. a T-shaped rod; 87. extruding a spring; 88. a fixed block; 89. a limiting plate; 9. a partition plate; 10. a terminal; 11. a door; 12. and an exhaust port.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Example 1:
referring to fig. 1-9, a grid-connected switching control device of an energy storage inverter, which comprises a box body 1, wherein a change-over switch 2 is installed in the box body 1, a controller 3 is arranged on one side of the change-over switch 2 in the box body 1, one end of the change-over switch 2 is electrically connected with a wire 4, one end of the wire 4 penetrates through the box body 1 and extends to the outside, a symmetrically distributed sensor 5 is sleeved on the surface of the wire 4, a separation plate 9 is installed in the box body 1, and the device further comprises: a switching component 6 arranged in the isolation plate 9, one end of which penetrates through the box body 1 and extends to the outside for switching the two monitored sensors 5; the cooling component 7 is arranged in the box body 1 and is used for blowing air to cool the inside of the sensor 5; the swing components 8 are symmetrically arranged in the isolation plate 9 and are used for improving the blowing range of the cooling component 7.
In the invention, when in use, an externally connected power grid line is connected to a connected circuit in the box body 1 through the lead 4, wherein the sensor 5 is sleeved on the surface of the lead 4, the current and the voltage which are transmitted through the lead 4 can be monitored in real time, overload or short circuit of the power grid during transmission is avoided, the controller 3 can control the change-over switch 2 to switch the connected circuit when abnormality occurs in monitoring, so that the power grid line and the device are in a disconnected state, thereby playing a role of protection, when the device monitors, the two sensors 5 which are arranged on the box body 1 can be switched back and forth through the change-over assembly 6, thus not only saving energy consumed during the operation of the device, but also comparing the two measured data, avoiding that the single sensor 5 can not measure accurate data due to failure in the traditional mode, the energy storage device is damaged, the accuracy of current and voltage monitoring data of a power grid conveying line is improved, in the process of the operation of the switching component 6, the switching component 6 is operated to drive the cooling component 7 to synchronously move, so that the cooling component 7 conveys external cold air into the box body 1, the installation positions of two installed sensors 5 are blown and cooled, the occurrence of a fault phenomenon caused by high temperature generated by long-time operation of the cooling component 7 is avoided, the service life of the sensors 5 is prolonged, the stability of the device in monitoring is further improved, in the process of the switching component 6, the swinging component 8 can be driven to synchronously operate, the air jet head 76 at the cooling component 7 horizontally reciprocates to point to the installation position at the sensors 5 to cool the air jet head, the air jet range of the cooling component 7 can be increased, the cooling effect of the sensors 5 is further improved, and the maintenance cost of the device is saved.
Example 2:
referring to fig. 1-9, a grid-connected switching control device of an energy storage inverter, which comprises a box body 1, wherein a change-over switch 2 is installed in the box body 1, a controller 3 is arranged on one side of the change-over switch 2 in the box body 1, one end of the change-over switch 2 is electrically connected with a wire 4, one end of the wire 4 penetrates through the box body 1 and extends to the outside, a symmetrically distributed sensor 5 is sleeved on the surface of the wire 4, a separation plate 9 is installed in the box body 1, and the device further comprises: a switching component 6 arranged in the isolation plate 9, one end of which penetrates through the box body 1 and extends to the outside for switching the two monitored sensors 5; the cooling component 7 is arranged in the box body 1 and is used for blowing air to cool the inside of the sensor 5; the swing subassembly 8 in division board 9 is installed to the symmetry for improve the scope of blowing of cooling subassembly 7 department, switch over subassembly 6 including installing the drive portion 61 at box 1 one side outer wall, the output of drive portion 61 is fixed with lead screw 62, the one end of lead screw 62 runs through division board 9 and rotates with the inner wall of box 1 through the bearing and link to each other, the surface threaded connection of lead screw 62 has screw thread piece 63, contact 66 is installed to screw thread piece 63 side, the bottom of screw thread piece 63 is provided with the locating part, the locating part is including fixing the stopper 64 in screw thread piece 63 bottom, stopper 64 sliding connection is on the surface of gag lever post 65, the tip of gag lever post 65 links to each other with the inner wall of box 1 is fixed.
Specifically, the driving part 61 can adopt a driving source such as a motor to replace driving, the driving part 61 can drive the screw rod 62 to rotate, so that the threaded block 63 on the screw rod 62 is displaced, one end of the threaded block 63 is connected and provided with the contact head 66, one side ends of the two sensors 5 are provided with the power connection terminals, the contact head 66 is in contact connection with the power connection terminals of one of the sensors 5 in the moving process, one of the sensors 5 works, the current voltage conveyed by the lead 4 is detected, after a period of time, the driving part 61 is started to reversely rotate, the contact head 66 is displaced to the other side and is contacted with the other sensor 5, the other sensor 5 works, the current voltage conveyed by the lead 4 is detected again, thus data detected at two sides can be compared, faults are avoided when the single sensor 5 detects, the occurrence of inaccurate data phenomenon is caused, the accuracy of data detection is improved, meanwhile, the two sensors 5 work intermittently, the energy consumption of the device work is saved, and the cost is saved.
Example 3:
referring to fig. 1-9, a grid-connected switching control device of an energy storage inverter, which comprises a box body 1, wherein a change-over switch 2 is installed in the box body 1, a controller 3 is arranged on one side of the change-over switch 2 in the box body 1, one end of the change-over switch 2 is electrically connected with a wire 4, one end of the wire 4 penetrates through the box body 1 and extends to the outside, a symmetrically distributed sensor 5 is sleeved on the surface of the wire 4, a separation plate 9 is installed in the box body 1, and the device further comprises: a switching component 6 arranged in the isolation plate 9, one end of which penetrates through the box body 1 and extends to the outside for switching the two monitored sensors 5; the cooling component 7 is arranged in the box body 1 and is used for blowing air to cool the inside of the sensor 5; the swing assembly 8 of symmetry installation in division board 9 for improve the scope of blowing of cooling assembly 7 department, cooling assembly 7 is including fixing the movable rod 71 at screw 63 top, the tip of movable rod 71 is fixed with stripper plate 72, stripper plate 72 sliding connection is in installing frame 73, installing frame 73 is fixed on the bottom inner wall of box 1, install bar gasbag 74 in the installing frame 73, the one end of bar gasbag 74 is fixed with air hose 75, the tip of air hose 75 runs through installing frame 73 and prescribes and has air jet head 76, be provided with check valve 791 on the air jet head 76, the one end of bar gasbag 74 is provided with the piece that induced drafts, the piece that induced drafts is including fixing the communicating pipe 77 at bar gasbag 74 tip, the tip of communicating pipe 77 runs through division board 9 and extends to the external fixation of box 1 and has intake pipe 78, the junction between intake pipe 78 and the communicating pipe 77 is provided with movable valve 79.
Specifically, in the process that the screw block 63 moves, the moving rod 71 can be driven to move synchronously, the extrusion plate 72 at the end part of the moving rod 71 extrudes the strip-shaped air bag 74 inside the installation frame 73, so that air inside the strip-shaped air bag 74 is conveyed to the air jet head 76 through the air conveying hose 75 and then is ejected, the air jet head 76 points to the installation position of the sensor 5, the sensor 5 can be blown and cooled by using ejected cooling air, the sensor 5 is prevented from being influenced by the detection of the sensor 5 due to the fact that the sensor 5 is high Wen Duichuan in the box 1 for a long time, when the screw block 63 moves to the other side, the extrusion plate 72 is separated from the strip-shaped air bag 74, at the moment, the movable valve 79 is opened due to the fact that the suction force is generated in the strip-shaped air bag 74, external cold air is adsorbed through the air inlet pipe 78 and conveyed to the inside the strip-shaped air bag 74 through the communicating pipe 77, then reciprocates in this way, the cold air is ejected through the air jet head 76, the one-way valve 791 is arranged on the air jet head 76, when the cold air is adsorbed, the air jet head 76 is closed by the one-way valve 791, the air jet head 76, the cold air is conveniently sucked through the air inlet pipe 78, the smooth operation of the air inlet pipe 78, and the dust prevention net can be arranged at the position, and dust prevention net.
Example 4:
referring to fig. 1-9, a grid-connected switching control device of an energy storage inverter, which comprises a box body 1, wherein a change-over switch 2 is installed in the box body 1, a controller 3 is arranged on one side of the change-over switch 2 in the box body 1, one end of the change-over switch 2 is electrically connected with a wire 4, one end of the wire 4 penetrates through the box body 1 and extends to the outside, a symmetrically distributed sensor 5 is sleeved on the surface of the wire 4, a separation plate 9 is installed in the box body 1, and the device further comprises: a switching component 6 arranged in the isolation plate 9, one end of which penetrates through the box body 1 and extends to the outside for switching the two monitored sensors 5; the cooling component 7 is arranged in the box body 1 and is used for blowing air to cool the inside of the sensor 5; the swing assembly 8 of symmetry installation in division board 9 for improve the scope of blowing of cooling assembly 7 department, swing assembly 8 includes the conical gear 81 of fixing on lead screw 62 surface, conical gear 81's surface engagement has fit gear 82, fit gear 82's axle center department is fixed with axis of rotation 83, the tip of axis of rotation 83 passes through the bearing and links to each other with fixed plate 84 rotation, the one end and the division board 9 fixed connection of fixed plate 84, the surface fixation of axis of rotation 83 has cam 85, the surface of cam 85 is provided with the reciprocating piece, fixed block 88 and jet head 76 fixed link to each other, the surface sliding connection of T type pole 86 has the limiting plate 89 that links to each other with division board 9 fixed, be fixed with extrusion spring 87 between limiting plate 89 and the limiting plate 89, extrusion spring 87 cover is established on T type pole 86, one side of box 1 is fixed with wiring end 10, change over switch 2 and controller 3 electrical property link to each other, one side of box 1 is provided with chamber door 11 through the hinge swivelling joint, the surface of chamber door 11 is provided with gas vent 12, be provided with the dust screen on gas vent 12.
Specifically, when the screw rod 62 rotates, the conical gear 81 can be driven to synchronously rotate, wherein the conical gear 81 is meshed with the engaging gear 82 for transmission, the rotating shaft 83 at one end of the engaging gear 82 is driven to rotate, the cam 85 is installed on the rotating shaft 83, the cam 85 is attached to the T-shaped rod 86, the T-shaped rod 86 is extruded to displace, and meanwhile, the extrusion spring 87 is matched, so that the fixed block 88 at the end part of the T-shaped rod 86 horizontally reciprocates, and further the jet head 76 is driven to synchronously move, the jet range of the jet head 76 can be increased, the cooling effect on the sensor 5 is improved, the probability of failure of the sensor 5 due to high temperature is reduced, the service life of the sensor 5 is prolonged, the power source can be saved, the production cost of the device is saved, the working state of the swinging assembly 8 is not influenced when the switching assembly 6 is switched to work, the operation is convenient, the position detected at the position of the sensor 5 can be shielded by the isolating plate 9, the electromagnetic anti-interference performance of the device is increased, and the high-temperature inside the isolating plate 9 can be discharged to the outside the box 1 through the arrangement of the exhaust port 12.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (10)
1. The grid-connected and off-grid switching control method of the energy storage inverter is characterized by mainly comprising the following steps of:
step A, monitoring the voltage and the frequency of a power grid in real time by using the device and the wiring end parts through two sensors (5);
and (B) step (B): and determining whether to switch from grid connection to grid disconnection according to the monitored grid voltage and frequency and a set threshold value, and controlling a change-over switch (2) to switch off the grid connection through a controller (3) arranged in the device when the switch is required.
2. The off-grid and on-grid switching control device of the energy storage inverter according to claim 1, characterized by comprising a box body (1), wherein a switch (2) is installed in the box body (1), a controller (3) is arranged on one side of the switch (2) in the box body (1), one end of the switch (2) is electrically connected with a wire (4), one end of the wire (4) penetrates through the box body (1) and extends to the outside, symmetrically distributed sensors (5) are sleeved on the surface of the wire (4), and a partition plate (9) is installed in the box body (1), and the off-grid and on-grid switching control device further comprises:
a switching component (6) arranged in the isolation plate (9), one end of which penetrates through the box body (1) and extends to the outside, and is used for switching the two monitored sensors (5);
the cooling component (7) is arranged in the box body (1) and is used for cooling the inside of the sensor (5) by blowing air;
and the swinging assemblies (8) are symmetrically arranged in the isolation plate (9) and are used for improving the blowing range of the cooling assembly (7).
3. The grid-connected and off-grid switching control device of the energy storage inverter according to claim 2, wherein the switching assembly (6) comprises a driving part (61) arranged on the outer wall of one side of the box body (1), a screw rod (62) is fixed at the output end of the driving part (61), one end of the screw rod (62) penetrates through the isolation plate (9) and is rotationally connected with the inner wall of the box body (1) through a bearing, a thread block (63) is connected to the surface of the screw rod (62) in a threaded manner, a contact head (66) is arranged on one side surface of the thread block (63), and a limiting piece is arranged at the bottom of the thread block (63).
4. The grid-connected and off-grid switching control device of the energy storage inverter according to claim 3, wherein the limiting piece comprises a limiting block (64) fixed at the bottom of the threaded block (63), the limiting block (64) is slidably connected to the surface of a limiting rod (65), and the end part of the limiting rod (65) is fixedly connected with the inner wall of the box body (1).
5. The grid-connected switching control device of the energy storage inverter according to claim 4, wherein the cooling component (7) comprises a moving rod (71) fixed at the top of a threaded block (63), an extrusion plate (72) is fixed at the end part of the moving rod (71), the extrusion plate (72) is slidably connected in a mounting frame (73), the mounting frame (73) is fixed on the inner wall of the bottom of the box body (1), a strip-shaped air bag (74) is mounted in the mounting frame (73), one end of the strip-shaped air bag (74) is fixed with a gas hose (75), a gas injection head (76) is provided at the end part of the gas hose (75) penetrating through the mounting frame (73), a one-way valve (791) is arranged on the gas injection head (76), and a suction piece is arranged at one end of the strip-shaped air bag (74).
6. The grid-off switching control device of an energy storage inverter according to claim 5, wherein the air suction member comprises a communicating pipe (77) fixed at the end of the strip-shaped air bag (74), the end of the communicating pipe (77) penetrates through the isolation plate (9) and extends to the outside of the box body (1) to be fixed with an air inlet pipe (78), and a movable valve (79) is arranged at the joint between the air inlet pipe (78) and the communicating pipe (77).
7. A grid-connected switching control device of an energy storage inverter according to claim 3, wherein the swinging assembly (8) comprises a conical gear (81) fixed on the surface of a screw rod (62), a mating gear (82) is meshed on the surface of the conical gear (81), a rotating shaft (83) is fixed at the axle center of the mating gear (82), the end part of the rotating shaft (83) is rotationally connected with a fixing plate (84) through a bearing, one end of the fixing plate (84) is fixedly connected with a separation plate (9), a cam (85) is fixed on the surface of the rotating shaft (83), and a reciprocating piece is arranged on the surface of the cam (85).
8. The grid-connected and disconnection switching control device of the energy storage inverter according to claim 7, wherein the reciprocating piece comprises a T-shaped rod (86) attached to the surface of the cam (85), one end of the T-shaped rod (86) is fixedly provided with a fixed block (88), the fixed block (88) is fixedly connected with the jet head (76), the surface of the T-shaped rod (86) is slidably connected with a limiting plate (89) fixedly connected with the isolation plate (9), an extrusion spring (87) is fixed between the limiting plate (89) and the limiting plate (89), and the extrusion spring (87) is sleeved on the T-shaped rod (86).
9. The grid-off switching control device of the energy storage inverter according to claim 2, wherein a wiring terminal (10) is fixed on one side surface of the box body (1), and the switching switch (2) is electrically connected with the controller (3).
10. The grid-connected and off-grid switching control device of the energy storage inverter according to claim 2, wherein a box door (11) is rotatably connected to one side surface of the box body (1) through a hinge, an exhaust port (12) is arranged on the surface of the box door (11), and a dust screen is arranged on the exhaust port (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311497319.5A CN117498412A (en) | 2023-11-10 | 2023-11-10 | Grid-off and grid-on switching control method of energy storage inverter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311497319.5A CN117498412A (en) | 2023-11-10 | 2023-11-10 | Grid-off and grid-on switching control method of energy storage inverter |
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